At 20 weeks pregnant your baby weighs about 11 ounces (310 g) and is roughly 7inches (17cm) long. Permanent second teeth are forming behind the milk teeth.Vernix is still being produced and secreted on the skin like an expensive body cream. Your baby is now busy producing meconium, the tarry black substance which will become the first bowel movement after birth. Meconium is a harmless mixture of amniotic fluid, digestive secretions and dead skin cells which accumulates in the baby’s bowels and is excreted in the first nappy.
Your baby is swallowing a lot now which is good for the digestive system. The genitals are now fully formed.
Now that you are halfway through your pregnancy the top of your uterus is level with your navel. It is important to make sure that you are having sufficient iron as this is crucial for the production of haemoglobin in red blood cells.
During pregnancy mothers have an increased blood volume and extra iron is needed to support the baby and the placenta. To increase your iron intake try eating more red meat, prunes, green leafy vegetables and soya-based products.
Now is the time that you might think about childbirth classes for you and your partner. Your doctor or local maternity unit will be happy to help you with any information about the right kind of classes for you.
What to expect at week 21 of your pregnancy...